#2133: add repository navigation option to icd command

[Ali-Shariati-Najafabadi]

This PR fixes #2133

Implemented changes:

• Added a new -r | --repository [<repository>] option to the icd shell function in cli/src/main/package/functions
• If <repository> is omitted, the project name is used as the repository name (fallback)
• If -w is not given, workspace main is searched first, then all other workspaces; icd navigates into the first workspace containing the repository
• If -w is given explicitly, only that workspace is searched (no fallback)
• If the repository is not found in any workspace, icd fails with Error: Repository '<name>' not found in any workspace.
• Updated icd --help usage/options text
• Updated documentation/cli.adoc with a description and example of the new option

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Testing instructions

1. Create a test project structure outside your real IDEasy installation:
   mkdir -p /tmp/icdtest/IDEasy/workspaces/main/cli && mkdir -p /tmp/icdtest/IDEasy/workspaces/dev/backend
2. In a new shell, set IDE_ROOT=/tmp/icdtest and IDE_HOME="" before sourcing cli/src/main/package/functions
3. Run icd -p IDEasy -r cli → expect cwd /tmp/icdtest/IDEasy/workspaces/main/cli (found in main)
4. Run icd -p IDEasy -r backend → expect cwd /tmp/icdtest/IDEasy/workspaces/dev/backend (not in main, found in dev)
5. Run icd -p IDEasy -r (no repository given) → expect cwd /tmp/icdtest/IDEasy/workspaces/main/IDEasy (fallback to project name)
6. Run icd -p IDEasy -r nope → expect Error: Repository 'nope' not found in any workspace. and exit code 1

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Checklist for this PR

• When running mvn clean test locally all tests pass and build is successful
• PR title is of the form #«issue-id»: «brief summary»
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