This is a backport of #15721 to Theia 1.62.x

This reverts commit ee5e882.

The commit is reverted as it breaks LLM behavior in many use cases, for
example when multiple tool results are required to continue.

This is a backport of #15731 to Theia 1.62.x

Mark system prompts, tools and messages for caching in the Anthropic
LanguageModel. For typical agent workflows like "@coder" this reduces
token costs by a large factor and reduces the pressure on the rate
limit.

Currently caching is enabled by default for all Anthropic models.

Also updates token tracking functionality to be aware of token caching
and updates the Anthropic SDK.

fixes #15729

Contributed on behalf of STMicroelectronics

Signed-off-by: Thomas Mäder <t.s.maeder@gmail.com>

We previously used a workaround in the browser-menu-plugin to support
initially empty menus, which weren’t compatible with Lumino.

Since the menu refactoring in #14676, this workaround is no longer
needed. In fact, it now causes issues like empty submenus appearing in
context menus. Removing the workaround fixes this regression.

Fixes #15694

Contributed on behalf of STMicroelectronics

Use the contentContainer for computations, because this is the DOM
element passed to PerfectScrollbar on creation

Instead of registering a save participant.

Fixes #15770

Contributed on behalf of STMicroelectronics

Signed-off-by: Thomas Mäder <t.s.maeder@gmail.com>

…15792)

Fixes #15664

Contributed on behalf of STMicroelectronics

Signed-off-by: Thomas Mäder <t.s.maeder@gmail.com>

Signed-off-by: Simon Graband <sgraband@eclipsesource.com>

Signed-off-by: Simon Graband <sgraband@eclipsesource.com>