Update documentation to fix typos and update consistency

[holmesadam]

No description provided.

[what-the-diff]

PR Summary

• Enhancement of Documentation Readability
  This PR includes multiple modifications in the language used throughout various documentation files to make the content easier to understand and correct any grammar inconsistencies.

• Standardization of Terms
  Changes have been made for uniformity in the use of certain terms across the documentation. Notably, the term 'datasource' now consistently appears as 'data source'.

• Improvement in Content Formatting
  Formatting enhancements in different parts of the documentation have been made including for headings, bullet point lists, and highlighted sections to provide a more coherent reading experience.

• Content Enrichment in Advanced Tables
  The instructions and descriptions in advanced-tables.md have been expanded, including information on how to use the Advanced Tables Plugin.

• Clarifications on Embedding Forms
  The instructions and warnings about embedding forms in usage/embed.md and other sections have been made more explicit for user understanding.

• Added Note For Trait Usage
  A note has been added in custom-designer.md and custom-schemata.md to guide users on the right way to use the trait.

• Typographical Fixes
  Minor typographical errors have been corrected, with a focus on maintaining sentence capitalization uniformity.

• Updated Introductions for Clarity
  In the introductory section, confusion has been reduced by replacing "here is the structure of the table" with "Here is the structure of the database tables".

• Sentence Endings
  A period has been added to punctuate the sentence: "options like columns number."

• Completeness of Information
  The sentence about fields now reads "create custom ones too" for completeness.

• Change in Phrasing for Clarity
  The previous wording "helps to query any reports you want with ease" has been replaced by "helps to create any reports you want with ease" for improved comprehension.

[atmonshi]

Thank you @holmesadam so much for all these PRs 🙏🏽
and sorry for the delay.

will start testing and review them and will let know if any changes needed.