[docs] copy text updates for footer, swap info and about section

[merchantcoppola]

putting together the copy text updates we got so far

Updating disclaimer/footer copy:

(crzy asked us multiple time to get rid of his name on the site, so this one has the highest prio out of the copytext updates)

replace this:

• with this:

This open-source, experimental dApp is developed and maintained by the Teia Community and powered by the Tezos blockchain.

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Updating menu intro copy:

replace this:

• with this
  Teia is an artwork made of artworks, an open, community owned digital platform for experimentation, trading ideas and works of creativity as OBJKT NFTs.

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Updating swapping info copy text:

replace this:

• with this:

The Teia marketplace fee is temporarily set to 0%. Please consider donating to the address hereandnow-fund.tez for maintenance funding.

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Updating "about" page copy text

replace this:

• with this:

<headline> Teia is ....

... a collaborative artwork made of artworks, a place for ideas and creative works.
... a non-profit, open-source online platform for trading digital assets as OBJKT NFTs.
... a collective, aligning under the values of sustainability, accessibility, and equity.
... owned and maintained by its community, built and improved by its digital citizens.

Teia is and always will be a work-in-progress.

<link> Core Values / Code of Conduct / Terms and Conditions

[melMass]

Nice, edits are on going at this url, only the about remains ;)