Restructure website to more intuitively find information for different user types

[maggo83]

All info is there, but sometimes it is hard to find or the layout/structure is weird.
-E.g. under "Hardware Overview" he first thing to see in a long list of Firmware Features + a link to github... why is that under HW?
-Under "Specter Wallet Vendors" there are the "Product Types": "Parts" + "Preassembled" (makes sense) and "Shield" (why is that needed?)
-"Donate" is hidden under "Contact"

Some specific proposals for changes:

1. Directly split between Specter Desktop and Specter DIY on first page and keep separate from there on (remainder of the proposals refers to the part for Specter DIY, not Desktop)

3. Clearly separate the following sections/ pages (as they serve different users/visitor types):
   -2.a Description of what specter DIY is / can do / what features it has (for new visitors that do not know the project) [Proposed title: "Device overview"]
   (incl. overview of Variants (DIY, Shield, Shield Lite) and comparison)

        -2.b Where to get the HW (for users that were "sold" e.g. by 2.a) [Proposed title: "Get the HW"]
             -For each Variant a clear list of links, maybe separated by categories: "real DIY" / "Kits" / "preassembled"
   
        -2.c Where to get the (latest) Firmware (for users who have bought the HW or need/want to update) [Proposed title: "Get the Firmware"]
             -Prebuild files
             -link to github to self-build + link / pointer to where to find the description
   
        -2.d How to build the HW/Firmware once bought/downloaded [Proposed title: "Build it!" or "Put it together!"]
             -For each Variant a clear list of links, maybe separated by "real DIY" / "Kits" / "preassembled"
   
        -2.e How to use the device once Firmware is installed and updated (for (newbie) users) [Proposed title: "Use it!"]
             -create/import a seed
             -sign transactions/messages
             -...
            -> should also have an easy to find and use interface to add findings/complaints (also for not too techy people, so we get good and a lot of feedback from "the jungle")
   
        -2.f How to support/donate? (For visitors that either want to contribute technically or by donating) [proposed title: "Support it!"]
             -one subpage for "Finance"
                          -Donate once (one click as easy as possible)
                         -(Maybe:)-one subpage to buy specter merch / become a sponsor? Check e.g. mempool [https://mempool.space/about]
             -one subpage for "Develop" -> links to github + tickets etc.
   
        2.g What / who is specter association (as is)
   

4. Ideally each page has one button to leave a comment / improvement proposal /feedback to the website with one click (and still a clear reference to which part of the website the feedback is referring to). It would be cool if this process is so lightweight, that users feel encouraged to even report typos if they see them.