Docs: explain mutually exclusive (disjoint) groups

[Pratyush020505]

User description

This PR documents how to create mutually exclusive (disjoint) groups using dynamic groups and free search expressions, as discussed in #7049.

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PR Type

Documentation

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Description

• Documents how to create mutually exclusive groups using dynamic groups

• Provides practical example with Read, Skimmed, Pending groups

• Explains using free search expressions with NOT operators

• Clarifies this approach doesn't affect static groups behavior

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Diagram Walkthrough

flowchart LR
  A["Dynamic Groups"] -- "with free search expressions" --> B["Mutually Exclusive Groups"]
  C["Static Groups"] -- "unchanged behavior" --> D["Multiple Group Membership"]
  B --> E["Example: Read/Skimmed/Pending"]

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File Walkthrough

Relevant files

Documentation

groups.md Add documentation for mutually exclusive groups                    en/finding-sorting-and-cleaning-entries/groups.md Added new section explaining mutually exclusive (disjoint) groups concept Documented approach using dynamic groups with free search expressions Provided practical example with three groups: Read, Skimmed, Pending Explained NOT operator usage for excluding entries from groups +24/-0

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PR Code Suggestions ✨

Explore these optional code suggestions:

Category	Suggestion	Impact
Possible issue	Correct logical flaw in example To ensure the example for mutually exclusive groups is logically correct, update the Skimmed group's search expression to also exclude entries with the read keyword. en/finding-sorting-and-cleaning-entries/groups.md [227-232] - **Read** group: keywords = read - **Skimmed** group: - keywords = skimmed + keywords = skimmed AND NOT keywords = read - **Pending** group: NOT (keywords = read OR keywords = skimmed) Apply / Chat Suggestion importance[1-10]: 8 __ Why: The suggestion correctly identifies a logical flaw in the documentation's example, which fails to demonstrate the concept of "mutually exclusive groups" as intended. Applying the fix is crucial for the accuracy and clarity of the new section.	Medium
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[Pratyush020505]

The lint warnings shown under “unchanged files with check annotations” appear to be pre-existing in files not modified by this PR. My changes are limited to groups.md only.