feat: explain light weight even more

[sesam]

under scalable header on the site we should mention that due to the default pruning a full node is nearly as light as an SPV client so even very weak hardware can connect to the network, adding to our premise of usability by anyone even with limited access

cc @0xb100d

[0xb100d]

Something to the effect that the unique nature of mimblewimble format allows all txs to be validated with a minimial amount of data, and onging research will likely allow more and more complete validation to be done with smaller and smaller amounts of space and processing overheads to the point where even mobile light clients will have almost all the same security assumptions as a full client, and contribute to the security of the network.

[CircusDad]

I looked into this 6+ year old "issue" and suggest it be closed.

Rational: The specific site location being addressed by the OP is unclear (and may be OBE all together).
I tried to find it using two different google searches.
scalable header site:grin.mw -inurl:forum.grin.mw
lightweight site:grin.mw -inurl:forum.grin.mw

I got one hit from grin.mw which was not applicable (research page). All other hits were within docs.grin.mw and I saw nothing looking to be the location referenced.

Furthermore:
The lightweight aspect of the blockchain with respect to hardware accessibility is now clear in the docs.grin.mw site (maybe it wasn't when the OP was written):

• https://docs.grin.mw/about-grin/scalability/

Building, verifying and storing transactions requires minimal resources. Anyone can verify the entire chain on a phone or cheap hardware, and fully participate in areas with poor network connectivity.

I suggest the issue be closed. If someone identifies a specific area needing clarification, they could open a new ticket (or fix it and submit a merge request).