Cleanup JetBrains command calling to be consistent with VSC (#8218)

Fixes
https://linear.app/sourcegraph/issue/QA-706/jbmac-specific-unable-to-generate-unit-tests-in-new-files-created

## Cleanup JetBrains command calling to be consistent with VSCode

This commit standardizes the command calling architecture in the
JetBrains plugin to match VSCode's implementation pattern. Key changes
include:

- **Consolidated command actions**: Removed duplicate action classes and
merged functionality into unified command actions
- **Simplified architecture**: Eliminated redundant base classes and
handlers, reducing code complexity
- **Consistent naming**: Updated command identifiers and action names to
align with VSCode conventions
- **Reduced bundle overhead**: Cleaned up resource files and plugin
configuration

Notable change is that after this unification `Generate Unit Test`
changed from being edit command to chat command.

**Impact**: 200 lines removed, improved maintainability, and better
cross-platform consistency between JetBrains and VSCode extensions.

## Test plan

Ideally requires full QA as it potentially impacts all JetBrains
commands.

<!-- Required. See
https://docs-legacy.sourcegraph.com/dev/background-information/testing_principles.
-->

Cleanup JetBrains command calling to be consistent with VSC (#8218)

Fixes
https://linear.app/sourcegraph/issue/QA-706/jbmac-specific-unable-to-generate-unit-tests-in-new-files-created

## Cleanup JetBrains command calling to be consistent with VSCode

This commit standardizes the command calling architecture in the
JetBrains plugin to match VSCode's implementation pattern. Key changes
include:

- **Consolidated command actions**: Removed duplicate action classes and
merged functionality into unified command actions
- **Simplified architecture**: Eliminated redundant base classes and
handlers, reducing code complexity
- **Consistent naming**: Updated command identifiers and action names to
align with VSCode conventions
- **Reduced bundle overhead**: Cleaned up resource files and plugin
configuration

Notable change is that after this unification `Generate Unit Test`
changed from being edit command to chat command.

**Impact**: 200 lines removed, improved maintainability, and better
cross-platform consistency between JetBrains and VSCode extensions.

## Test plan

Ideally requires full QA as it potentially impacts all JetBrains
commands.

<!-- Required. See
https://docs-legacy.sourcegraph.com/dev/background-information/testing_principles.
-->

Cleanup JetBrains command calling to be consistent with VSC (#8218)

Fixes
https://linear.app/sourcegraph/issue/QA-706/jbmac-specific-unable-to-generate-unit-tests-in-new-files-created

## Cleanup JetBrains command calling to be consistent with VSCode

This commit standardizes the command calling architecture in the
JetBrains plugin to match VSCode's implementation pattern. Key changes
include:

- **Consolidated command actions**: Removed duplicate action classes and
merged functionality into unified command actions
- **Simplified architecture**: Eliminated redundant base classes and
handlers, reducing code complexity
- **Consistent naming**: Updated command identifiers and action names to
align with VSCode conventions
- **Reduced bundle overhead**: Cleaned up resource files and plugin
configuration

Notable change is that after this unification `Generate Unit Test`
changed from being edit command to chat command.

**Impact**: 200 lines removed, improved maintainability, and better
cross-platform consistency between JetBrains and VSCode extensions.

## Test plan

Ideally requires full QA as it potentially impacts all JetBrains
commands.

<!-- Required. See
https://docs-legacy.sourcegraph.com/dev/background-information/testing_principles.
-->

Update version to 1.116.0

Changelog for 1.116.0 (#8220)

Automated release and changelog for Cody VS Code 1.116.0
  ## Test plan
  N/A - changelog update

---------

Co-authored-by: sourcegraph-bot <bot@sourcegraph.com>

release agent-v5.5.23

chore(cody): update marketplace listing readme (#8212)

Context:
[thread](https://sourcegraph.slack.com/archives/C04MSD3DP5L/p1753740794913999)
## Test plan
update README.md
<!-- Required. See
https://docs-legacy.sourcegraph.com/dev/background-information/testing_principles.
-->

Increase timeout

Update vscode package version (#8197)

Update VS Code package version to 1.114.0

## Test plan

None