Restores the expected behavior for template text output so existing templates handle escaped content consistently again. This reduces the risk of incorrectly displayed report or page content after recent template rendering changes.

[FIX] base: t-esc does not escape Markdown content and is equal to t-out

This is the same behavior as javascript. Which had been changed during
the refactoring of qweb. t-esc asked for escaping whatever the content.
However, a lot of templates still use t-esc. It is easier to go back to
the previous functionality.

[FIX] all: add missing encoding for the templates

This update refreshes the spreadsheet engine used in Documents and fixes several issues that could affect display, selections, filters, and test stability. Users should see more reliable spreadsheet behavior, especially around pivots, hidden headers, clipped text, dropdowns, and Firefox rendering.

Chilean electronic invoices containing the '&' character are now formatted correctly before being sent to the tax authority. This prevents avoidable rejections and helps keep invoicing flows moving without manual correction.

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X-original-commit: 636dbd175970126ab1646737537389a6df761fbc