Add udf and trigger commands for server-side programming management

[mkrueger]

Summary

Adds udf and trigger commands so the shell can manage the remaining Cosmos DB for NoSQL server-side programming resources, completing the feature set requested in #103 (the sproc command was added separately in #124).

Both commands mirror the sproc surface and operate on the current container (same scope as index).

udf

Subcommand	Behavior
list	List user-defined function ids in the current container
show <name>	Display a UDF body
exists <name>	Boolean result usable in if/while conditions
create <name> <file>	Create from a JS file or piped body; --force to replace
delete <name>	Delete a UDF

trigger

Subcommand	Behavior
list	List trigger ids with their type and operation
show <name>	Display a trigger body
exists <name>	Boolean result usable in if/while conditions
create <name> <file>	Create from a JS file or piped body; --type (pre/post, required), --operation (all/create/replace/delete/update, default all), --force to replace
delete <name>	Delete a trigger

Examples

udf list
udf create myFunc ./myFunc.js
udf exists myFunc

trigger list
trigger create myTrigger ./myTrigger.js --type pre --operation create
trigger create myTrigger ./myTrigger.js --type post --force

Notes

• Both commands are restricted in MCP (run manually in the shell), consistent with sproc.
• list returns structured JSON for piping; exists returns a ShellBool.

Testing

• Added unit tests for the pure helpers (subcommand normalization, trigger type/operation parsing).
• dotnet build clean; full test suite passes (1315 passed, 74 skipped, 0 failed), including the localization key audit and help verification tests that validate command registration.

Docs

• docs/commands.md: new udf and trigger sections.
• CHANGELOG.md: Unreleased entries linking [P1] Add Stored Procedures, UDFs, and Triggers management #103.

Part of #103.

[Copilot]

Pull request overview

Adds new CLI surfaces to manage Cosmos DB for NoSQL server-side programming artifacts (UDFs and triggers) from within CosmosDBShell, completing the server-side programming management set alongside the previously added stored procedure support.

Changes:

• Introduces new udf and trigger commands with list/show/exists/create/delete subcommands scoped to the current container (with --database/--container overrides).
• Adds localized help/error strings for both commands and updates user docs (docs/commands.md) plus the Unreleased changelog.
• Adds unit tests for the pure helper logic (subcommand normalization; trigger type/operation parsing).

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
docs/commands.md	Documents the new udf and trigger command surfaces and examples.
CosmosDBShell/lang/en.ftl	Adds localization strings for help text and errors for both commands.
CosmosDBShell/Azure.Data.Cosmos.Shell.Commands/UdfCommand.cs	Implements udf command behavior (list/show/exists/create/delete) against container scripts.
CosmosDBShell/Azure.Data.Cosmos.Shell.Commands/TriggerCommand.cs	Implements trigger command behavior including --type and --operation parsing.
CosmosDBShell.Tests/CommandTests/UdfCommandTests.cs	Tests UdfCommand.NormalizeSubcommand.
CosmosDBShell.Tests/CommandTests/TriggerCommandTests.cs	Tests TriggerCommand helper parsing/normalization.
CHANGELOG.md	Adds Unreleased entries describing the new commands.