DOC-1050: Update Pinecone credentials to medium tier template

[freakwriter]

Remove prerequisites section, change to numbered step-by-step instructions.

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Overall readability score: 43.02 (🟢 +0.01)

File	Readability
pinecone.md	34.04 (🟢 +8.19)

View detailed metrics

🟢 - Shows an _increase_ in readability 🔴 - Shows a _decrease_ in readability File | Readability | FRE | GF | ARI | CLI | DCRS --- | --- | --- | --- | --- | --- | --- [pinecone.md](https://github.com/n8n-io/n8n-docs/blob/0ca0f7e9c9e54012f8ce7a855ac26478ef2c734e/docs/integrations/builtin/credentials/pinecone.md "docs/integrations/builtin/credentials/pinecone.md") | 34.04 | 10.67 | 8.81 | 18.2 | 19 | 8.11   | 🟢 +8.19 | 🟢 +8.87 | 🟢 +1.16 | 🟢 +1.8 | 🟢 +0 | 🟢 +0.66 Averages:   | Readability | FRE | GF | ARI | CLI | DCRS --- | --- | --- | --- | --- | --- | --- Average | 43.02 | 34.75 | 11.68 | 14.89 | 14.37 | 8.55   | 🟢 +0.01 | 🟢 +0.01 | 🟢 +0 | 🟢 +0 | 🟢 +0 | 🟢 +0

View metric targets

Metric | Range | Ideal score --- | --- | --- Flesch Reading Ease | 100 (very easy read) to 0 (extremely difficult read) | 60 Gunning Fog | 6 (very easy read) to 17 (extremely difficult read) | 8 or less Auto. Read. Index | 6 (very easy read) to 14 (extremely difficult read) | 8 or less Coleman Liau Index | 6 (very easy read) to 17 (extremely difficult read) | 8 or less Dale-Chall Readability | 4.9 (very easy read) to 9.9 (extremely difficult read) | 6.9 or less